Fiber Optics
DC/DC (5 V/3.3 V) Single Mode 155 MBd
ATM/SDH/SONET 1x9 Long Haul Transceiver
with ST
®
Connector
V23826-C18-T64
V23826-C18-T364
Features
• Compliant with ATM, SONET OC-3, SDH STM-1
• Meets mezzanine standard height of 9.8 mm
• Compact integrated transceiver unit with
– MQW laser diode transmitter
– InGaAs PIN photodiode receiver
– Duplex ST
®
receptacle
• Class 1 FDA and IEC laser safety compliant
• FDA Accession No. 9520890-20
• Single power supply (5 V or 3.3 V)
• Signal detect indicator
• PECL differential inputs and outputs
• Process plug included
• Input Signal Monitor
• Wave solderable and washable with process plug inserted
• Typical dynamic range of 36 dB
• Industry standard multisource 1x9 footprint
• For distances of up to 40 km on single mode fiber
V238
26-C
18 - T
64
ST
®
is a registered trademark of AT&T
Data Sheet
1
2000-03-01
V23826-C18-T64
V23826-C18-T364
Pin Configuration
Pin Configuration
1
bottom
view
9
Figure 1
Pin Description
Pin
No.
1
2
3
4
Symbol
Rx
V
EE
RD
RDn
SD
PECL Output
active high
Power Supply
PECL Input
Power Supply
Mech. Support
Rx Signal
Detect
Rx +3.3 V/5 V
Tx +3.3 V/5 V
Tx Input Data
Tx Ground
Stud Pin
Level/Logic
Power Supply
PECL Output
Function
Rx Ground
Description
Negative power supply,
normally ground
Inverted receiver output data
A high level on this output shows
that optical data is applied to the
optical input.
Positive power supply,
+3.3 V/5 V
Inverted transmitter input data
Transmitter input data
Negative power supply,
normally ground
Not connected
Rx Output Data Receiver output data
5
6
7
8
9
S1/2
Rx
V
CC
Tx
V
CC
TDn
TD
Tx
V
EE
Data Sheet
2
2000-03-01
V23826-C18-T64
V23826-C18-T364
Description
Description
The Infineon single mode ATM transceiver complies with the ATM Forum's Network
Compatible ATM for Local Network Applications document and ANSI's Broadband
ISDN - Customer Installation Interfaces, Physical Media Dependent Specification,
T1.646-1995, Bellcore-SONET OC-3/LR-1 and ITU-T G.957 STM-1/L.1.1.
ATM was developed to facilitate solutions in multimedia applications and real time
transmission. The data rate is scalable, and the ATM protocol is the basis of the
broadband public networks being standardized in the International Telecommunications
Union (ITU), the former International Telegraph and Telephone Consultative Committee
(CCITT). ATM can also be used in local private applications.
The Infineon single mode ATM long haul transceiver is a single unit comprised of a
transmitter, a receiver, and an ST receptacle. This design frees the customer from many
alignment and PC board layout concerns. The module is designed for low cost WAN
applications. It can be used as the network end device interface in workstations, servers,
and storage devices, and in a broad range of network devices such as bridges, routers,
intelligent hubs, and wide area ATM switches.
This transceiver operates at 155.520 Mbit/s from a single power supply (+5 V or +3.3 V).
The differential data inputs and outputs are PECL compatible.
Functional Description
This transceiver is designed to transmit serial data via single mode cable.
Signal Monitor and
Automatic Shut-Down
LEN
TD
TD
Laser
ISM
Driver
Laser Coupling Unit
e/o
Laser
Power
Control
Monitor
RD
RD
SD
o/e
Single Mode Fiber
RX Coupling Unit
o/e
Receiver
Figure 2
Functional Diagram
Data Sheet
3
2000-03-01
V23826-C18-T64
V23826-C18-T364
Description
The transmitter converts electrical PECL compatible serial data (TD and TDnot) into
optical serial data. It contains a laser driver circuit that drives the modulation and bias
current of the laser diode. The currents are controlled by a power control circuit to
guarantee constant output power of the laser over temperature and aging.
The power control uses the output of the monitor PIN diode (mechanically built into the
laser coupling unit) as a controlling signal, to prevent the laser power from exceeding the
operating limits.
This transceiver contains an Input Signal Monitor (ISM), that switches the optical power
off if a continuously low level is applied at Data Input.
The receiver component converts the optical serial data into PECL compatible electrical
data (RD and RDnot). The Signal Detect (SD, active high) shows whether optical data is
present
1)
.
This module is a Class 1 laser product, due to an integrated automatic shutdown circuit
that disables the laser when it detects transmitter failures.
Single fault condition is ensured by means of an integrated automatic shutdown circuit
that disables the laser when it detects transmitter failures. A reset is only possible by
turning the power off, and then on again.
The transceiver contains a supervisory circuit to monitor the power supply. This circuit
makes an internal reset signal whenever the supply voltage drops below the reset
threshold. It keeps the reset signal active for at least 15 milliseconds after the voltage
has risen above the reset threshold. During this time the laser is inactive.
Regulatory Compliance
Feature
Electrostatic Discharge
(ESD) to the Electrical
Pins
Immunity:
Electrostatic Discharge
(ESD) to the Duplex SC
Receptacle
Immunity:
Radio Frequency
Electromagnetic Field
Standard
MIL-STD 883C
Method 3015.4
EN 61000-4-2
IEC 61000-4-2
Comments
Class 1 (>1000 V)
Discharges of ±15 kV with an air
discharge probe on the receptacle
cause no damage.
With a field strength of 10 V/m rms,
noise frequency ranges from 3 MHz
to 1 GHz. No effect on transceiver
performance between the
specification limits.
Noise frequency range:
30 MHz to 6 GHz, margins depend
on PCB layout and chassis design.
EN 61000-4-3
IEC 61000-4-3
Emission:
Electromagnetic
Interference EMI
1)
FCC Class B
EN 55022 Class B
CISPR 22
We recommend to switch off the transmitter supply (
V
CC
- Tx) if no transmitter input data is applied.
Data Sheet
4
2000-03-01
V23826-C18-T64
V23826-C18-T364
Technical Data
Technical Data
Absolute Maximum Ratings
Parameter
Package Power Dissipation
1)
Supply Voltage
Data Input Levels
Differential Data Input Voltage
Operating Ambient Temperature
Storage Ambient Temperature
Soldering Conditions Temp/Time
(MIL-STD 883C, Method 2003)
1)
Symbol
Limit Values
min.
max.
1.5
Unit
W
V
5V
3.3 V
V
CC
–
V
EE
7
5
V
CC
+ 0.5
2.5
0
–40
70
85
250/5.5
°C/s
°C
For
V
CC
–
V
EE
(min., max.). 50% duty cycle. The supply current does not include the load drive current of the
receiver output.
Exceeding any one of these values may destroy the device immediately.
Recommended Operating Conditions
Parameter
Ambient Temperature
Power Supply Voltage
Supply Current
1)
Transmitter
Data Input High Voltage
Data Input Low Voltage
Input Data Rise/Fall Time
10%–90%
Receiver
Output Current
Input Center Wavelength
1)
Symbol
min.
3.3 V
5V
3.3 V
5V
Limit Values
typ.
3.3
5
175
190
max.
70
3.5
5.25
250
270
–880
–1475
1.3
Unit
°C
V
mA
T
AMB
0
V
CC
–
V
EE
3.1
4.75
I
CC
V
IH
–
V
CC
–1165
V
IL
–
V
CC
–1810
t
R
,
t
F
0.4
mV
ns
I
O
λ
C
1260
25
1360
mA
nm
For
V
CC
–
V
EE
(min., max.) 50% duty cycle. The supply current does not include the load drive current of the
receiver output.
Data Sheet
5
2000-03-01
Microchip MCU
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